Unbound service was killed: out of swap space

[ajfriesen]

Hey,

ocasionally I have the problem that my internet is gone. Checking further DNS was missing. The unbound service was off and I had to start the service again.
And thanks to @eminent in this hread https://forum.opnsense.org/index.php?topic=25185.0 I found this in my logs:

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2021-10-26T01:06:42 kernel pid 1943 (unbound), jid 0, uid 59, was killed: out of swap space
2021-10-26T01:06:35 kernel pid 80680 (python3.8), jid 0, uid 0, was killed: out of swap space


I am wondering what caused this.
I am running on an APU 2C4 4GB RAM 3x Intel Gigabit + 16 GB m2ssd
I have just installed a few plugins and do not see why I should have a process killed because of swap space.

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os-acme-client (installed) 3.2 614KiB OPNsense ACME Client
os-dyndns (installed) 1.24_2 169KiB OPNsense Dynamic DNS Support
os-haproxy (installed) 3.5 659KiB OPNsense Reliable, high performance TCP/HTTP load balancer
os-node_exporter (installed) 1.1 18.6KiB OPNsense Prometheus exporter for machine metrics
os-smart (installed) 2.2 22.0KiB OPNsense SMART tools
os-theme-cicada (installed) 1.28 5.27MiB OPNsense The cicada theme - dark grey
os-wireguard (installed) 1.7 47.2KiB OPNsense WireGuard VPN service
Running the 21.7.3_3 but also happened on the older versions.

Can someone point me in the right direction about why this happened and how to avoid this?
I am not doing something like traffic analyzing or another heavy workload as far as I know.

[bartjsmit]

Swap space is disk. How much is left of your 16 GB drive?